Effects of Drying Conditions, Phase Transformations, and Carbonation Reactions on Measurements of Sorption Isotherms of Building Materials

The sorption isotherm is one of the basic material properties used in hygrothermal modeling of building envelope performance. Measurement of this property is deceptively simple. Specimens are first dried and then exposed to a series of higher relative humidities to develop a curve of moisture conten...

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Bibliographic Details
Published in:	Journal of ASTM International Vol. 4; no. 8; pp. 1 - 10
Main Authors:	Wilkes, Kenneth E., Atchley, Jerry A., Childs, Phillip W., Desjarlais, Andre
Format:	Journal Article
Language:	English
Published:	01-09-2007
Subjects:	cement wood sorption isotherm wood products gypsum hygrothermal properties
Online Access:	Get full text
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Summary:	The sorption isotherm is one of the basic material properties used in hygrothermal modeling of building envelope performance. Measurement of this property is deceptively simple. Specimens are first dried and then exposed to a series of higher relative humidities to develop a curve of moisture content versus relative humidity at constant temperature. This paper discusses some confounding effects that we have observed while performing measurements on a number of common building materials. Materials studied included gypsum products, wood and wood products, and cementitious materials.
ISSN:	1546-962X 1546-962X
DOI:	10.1520/JAI100459